Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.
A250606
Number of (n+1) X (3+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =57a(1) =140a(2) =297a(3) =592a(4) =1153a(5) =2236a(6) =4353a(7) =8528a(8) =16809a(9) =33292a(10) =66169a(11) =131824a(12) =263025a(13) =525308a(14) =1049745a(15) =2098480a(16) =4195801a(17) =8390284a(18) =16779081a(19) =33556496a(20) =67111137a(21) =134220220a(22) =268438177a(23) =536873872a(24) =1073745033a(25) =2147487116a(26) =4294971033
External references
- oeis: A250606